In a series of nine images, you can see the order I generally use to make a piece. This one has an average number of layers. The stitching in the second image shows how I sketch things in to make sure the top layers will fall correctly on the underneath layers.
In the second row, you can see the details sketched in with stitching, including the reflections in the river and the foliage on trees.
The third row shows the final details added to round out the picture.